All United Airline flights are cancelled tonight because of "computer problems".
From LVRJ: United Airlines has grounded its flights nationwide because of a "computer problem," according to a McCarran International Airport spokesman.
Glenn Gardner said he did not have more details on the source of the problem, which appeared to happen this evening. United flights will not be leaving the airport until it's resolved.
United's web page is also down.
Wouldn't be surprised if it was hackers.